selftests: mptcp: join: validate MPJ SYN TX MIB counters

A few new MIB counters have been added. They are being validated here.

Most of the time, there are no errors, but sometimes, more MPJ SYN are
queued compared to the numbers that are received.

Only one test has an error, the one to connect to a broadcast IP address.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

tools/testing/selftests/net/mptcp/mptcp_join.sh

@@ -1372,6 +1372,66 @@ chk_join_nr()
 	fi
 }
 
+chk_join_tx_nr()
+{
+	local syn_nr=$1
+	local festab=$2
+	local create=$3
+	local bind=$4
+	local connect=$5
+	local count
+
+	print_check "syn TX"
+	count=$(mptcp_lib_get_counter ${ns2} "MPTcpExtMPJoinSynTx")
+	if [ -z "$count" ]; then
+		print_skip
+	elif [ "$count" != "$syn_nr" ]; then
+		fail_test "got $count JOIN[s] syn TX expected $syn_nr"
+	else
+		print_ok
+	fi
+
+	print_check "syn TX Fully Estab Error"
+	count=$(mptcp_lib_get_counter ${ns2} "MPTcpExtMPJoinSynTxFEstabErr")
+	if [ -z "$count" ]; then
+		print_skip
+	elif [ "$count" != "$festab" ]; then
+		fail_test "got $count JOIN[s] syn TX Fully Estab Error expected $festab"
+	else
+		print_ok
+	fi
+
+	print_check "syn TX Create Socket Error"
+	count=$(mptcp_lib_get_counter ${ns2} "MPTcpExtMPJoinSynTxCreatSkErr")
+	if [ -z "$count" ]; then
+		print_skip
+	elif [ "$count" != "$create" ]; then
+		fail_test "got $count JOIN[s] syn TX Create Socket Error expected $create"
+	else
+		print_ok
+	fi
+
+	print_check "syn TX Bind Error"
+	count=$(mptcp_lib_get_counter ${ns2} "MPTcpExtMPJoinSynTxBindErr")
+	if [ -z "$count" ]; then
+		print_skip
+	elif [ "$count" != "$bind" ]; then
+		fail_test "got $count JOIN[s] syn TX Bind Error expected $bind"
+	else
+		print_ok
+	fi
+
+	print_check "syn TX Connect Error"
+	count=$(mptcp_lib_get_counter ${ns2} "MPTcpExtMPJoinSynTxConnectErr")
+	if [ -z "$count" ]; then
+		print_skip
+	elif [ "$count" != "$connect" ]; then
+		fail_test "got $count JOIN[s] syn TX Connect Error expected $connect"
+	else
+		print_ok
+	fi
+}
+
 # a negative value for 'stale_max' means no upper bound:
 # for bidirectional transfer, if one peer sleep for a while
 # - as these tests do - we can have a quite high number of
@@ -1907,6 +1967,7 @@ subflows_error_tests()
 		speed=slow \
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 0 0 0
+		chk_join_tx_nr 0 0 0 0 0
 	fi
 
 	# multiple subflows, with subflow creation error
@@ -1919,6 +1980,7 @@ subflows_error_tests()
 		speed=slow \
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
+		chk_join_tx_nr 2 0 0 0 0
 	fi
 
 	# multiple subflows, with subflow timeout on MPJ
@@ -2306,6 +2368,7 @@ remove_tests()
 		addr_nr_ns1=-3 speed=10 \
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
+		chk_join_tx_nr 2 0 0 0 1
 		chk_add_nr 3 3
 		chk_rm_nr 3 1 invert
 		chk_rst_nr 0 0